Thomas's sister, who mostly giggles. Although she is a good student in school, Thomas often believes she is silly and stupid. Margot, however, is as troubled as Thomas by their parents' relationship and the violence in their home. This becomes clear when Margot confronts Father with a knife during a violent family struggle. She tells her father, who falls to his knees to pray, "I don't give a damn what you believe. But there will be no more hitting." In the end, Margot becomes the one member of their family strong enough to stand up to their authoritarian father. Thomas eventually believes that his sister, who stares down her father, has become a strong witch, like Mrs. van Amersfoort.
